Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Larkspur, CO, based on the USDA Hardiness Zone 5b.
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Larkspur, CO Frost Dates & Growing Season
Last Spring Frost Date for Larkspur, CO
The average last frost date in spring for Larkspur is May 24th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until June 7th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Larkspur, CO
The average first frost date in fall for Larkspur is September 25th. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Larkspur, CO
Based on historical frost data, the estimated growing season length in Larkspur is approximately 124 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Larkspur, CO Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Larkspur, CO Monthly Planting Recommendations
March
In March, recommended activities include starting Begonia seeds indoors (from March 15th to March 29th), starting Cauliflower seeds indoors (from March 29th to April 12th), and starting Pepper seeds indoors (from March 29th to April 12th).
April
In April, recommended activities include direct sowing Garden Cress (from April 26th to May 10th), direct sowing Sweet Pea (from April 26th to May 10th), and starting Marigold seeds indoors (from April 12th to April 26th).
May
In May, recommended activities include direct sowing Anise (from May 31st to June 7th), direct sowing Moss Rose (from May 31st to June 14th), and direct sowing Hyssop (from May 10th to May 24th).
June
In June, recommended activities include direct sowing Butterfly Pea (from June 7th to June 21st), direct sowing Black Bean (from June 7th to June 21st), and direct sowing Jute (from June 7th to June 21st).